1 /*
   2  * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test IntxTest
  26  * @bug 8038756
  27  * @library /test/lib
  28  * @modules java.base/jdk.internal.misc
  29  * @modules java.management/sun.management
  30  * @build sun.hotspot.WhiteBox
  31  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  32  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  33  * @run main/othervm/timeout=600 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xint -XX:-ProfileInterpreter IntxTest
  34  * @summary testing of WB::set/getIntxVMFlag()
  35  * @author igor.ignatyev@oracle.com
  36  */
  37 import jdk.test.lib.Platform;
  38 public class IntxTest {
  39     private static final String FLAG_NAME = "OnStackReplacePercentage";
  40     private static final String FLAG_DEBUG_NAME = "InlineFrequencyCount";
  41     private static final long COMPILE_THRESHOLD = VmFlagTest.WHITE_BOX.getIntxVMFlag("CompileThreshold");
  42     private static final Long[] TESTS = {0L, 100L, (long)(Integer.MAX_VALUE>>3)*100L};
  43 
  44     public static void main(String[] args) throws Exception {
  45         find_and_set_max_osrp();
  46         VmFlagTest.runTest(FLAG_NAME, TESTS,
  47             VmFlagTest.WHITE_BOX::setIntxVMFlag,
  48             VmFlagTest.WHITE_BOX::getIntxVMFlag);
  49         VmFlagTest.runTest(FLAG_DEBUG_NAME, VmFlagTest.WHITE_BOX::getIntxVMFlag);
  50     }
  51 
  52     static void find_and_set_max_osrp() {
  53         long max_percentage_limit = (long)(Integer.MAX_VALUE>>3)*100L;
  54         max_percentage_limit = COMPILE_THRESHOLD == 0  ? max_percentage_limit : max_percentage_limit/COMPILE_THRESHOLD;
  55         if (Platform.is32bit() && max_percentage_limit > Integer.MAX_VALUE) {
  56           max_percentage_limit = Integer.MAX_VALUE;
  57         }
  58         TESTS[2] = max_percentage_limit;
  59     }
  60 }
  61 
--- EOF ---